This is not very technical for you clever folk who understand computers etc but I am a bit of a dummy where such things are concerned. On my keyboard there is a key on the top left which has ` and ¬, which I can access in the usual way, as you can see. But it also has a third symbol, a vertical, straight line - hw do I access this please?
You know, after I read Jno's reply, my keyboard at home and here are identical, I think. However my laptop is different so my real answer should have been I don't know :-)
Wow! Fascinating stuff. OK, so now I'm going to try the key to the left of Z on my keyboard, here goes ... | brilliant. It's marked ¦ but comes out as |. How very confusing, but what fun trying all the options. Thanks everyone, you have managed to give an O.A.P. some entertainment.